Circulating drip vent



March 1 1927. 1,619,238

A. BUSS CIRCULATING DRIP VENT Filed April 15 i H I. J

n *2 u i k NJ Q L:

INVENTOR.

Aueus'r Buss A TTORNEY.

Patented Mar. 1, 1927.

UNITED STATES aueus'r BUSS, or na'raorr, MICHIGAN.

OIBOULATHQG DRIP VENT.

Application filed April 18, 1925. Serial No. 22,788.

My invention relates to a new and useful improvement in a circulating drip vent, and has for its object, the revision of a circulating drip vent, whic will be simple in structure, economical of manufacture and highly efficient in use.

Another object of the invention is the provision of a circulating drip vent, adapted for mounting in the return pi e of a twol0 pipe steam heating system, an so arranged and constructed as to be open at all times, to permit the escape of air from the return pipe, irrespective as to the temperature of the return pipe.

Another object of the invention is the provision of a circulating drip vent of the class described, which will be open at all times, and so arranged and constructed as to prevent any backward flow of water from the boiler with which used.

Other objects will appear hereinafter.

The invention consists in the combination and arrangement of parts hereinafter described and claimed.

The invention will be best understood from a reference to the accompanying drawings, which form a part of this specification and in which,

Fig. 1 is a fragmentary, side elevational view of a heating system, showing the invention applied,

Fig. 2 is a side elevational view taken on substantially lines 22 of Fig. 1,

Fig. 3 is a top plan view of the invention,

Fig. 4 is a longitudinal vertical central sectional view of the invention.

As shown in the drawings, the invention comprises a substantiall T-shaped member, having the stem 9 exteriorly threaded, adjacent its upper end and provided with a cap 10. The stem 9 is provided with the bore 11, which is in registration with the opening 12 formed in the cap 10. Positioned loosely on the end of the stem 9, so as to cover the bore 11, is a disc 13 which is of smaller outside diameter than the inside diameter of the cap and larger than the diameter of the bore 11. One arm of the T is provi d with an opening. or bore 14, which extends partially into the other arm of the T and communicates with the reduced passageway 15. The arms of the T are threaded exteriorly to accommodate couplings 16 and 17, which are threaded on to the return pipe 18, which-leads from the radiator of the boiler used for heating purposes, the T being interposed in the return ipe between the radiator and the boiler. he passage 15 is directed toward the boiler, so that the air and water coming from the radiator passes into the bore 14 and then is brought into communication with the reduced passage 15. mitted to escape outwardly through the passage 11, the disc 13 rising sufiiciently to permit this escape of air. The water coming from the radiator is permitted to pass through the passage 15 into the return pipe 18, so as to be conducted to the boiler, an excess of water in the bore 11, causing the disc 13 to close the opening 12. The disc 13 will not permit the escape of steam through the opening 12 to any great extent, inasmuch as the steam, when present in the bore 11 to any great extent. is under sufiicient pressure to raise the disc 13 into closing position on-the openin 12. The reduction of the passage 15 retar s so as to practically prevent the backing of water from the oiler so that an efiicient and cheaply constructed circulating dri vent is provided which will operate at al times irrespective as to the temperature of the air, steam or water, which is passing through=the return p I am aware that automatic circulating drip vents have been provided, but these are operated principally by a thermostat, so as to be closed when the return ipe is raised to a certain temperature, thus essening the efficiency of the drip vent, inasmuch as the escape is not permitted after the temperature is raised sufiiciently to operate the thermostat.

In Fig. 1, I have shown the boiler 19 provided with a steam pipe 20, which has the usual steam return pipe 21 connected to the pipe 22 which communicates with the water in the boiler. This steam ipe 20 is connected by the pipe 23 to t e radiator 24 which is provided with a return ipe 18, which projects downwardly and as the angular y turned portion 18, in which the invention is interposed. The pipe 18, after passing from the drip vent is connected at one end to the pipe 25 by means of a suitable nipple 26 which is placed at an angle of 45 degrees, to assure the proper flow. The ipe 25 communicates with the pipe 22. T e ipe 18 is connected to the outlet port of t e radiator 24 by means of the pipe 18,

The air is then per- \Vith the invention interposed in the return pipe, as shown, a steam heating system is provided, which is always open to the atmosphere and into which a passage of the cold outside air is prevented upon a rcdneiug of the pressure in the boiler or in the pipes, inasmuch as the disc 13 serves to close the entrance to the pipes upon a reduction of pressure, so that the outside atmosphere has no access to the exterior of the pipes; consequently, a saving of fuel is had inasmuch as the pipes are ermitted to cool less quickly and the circu ation of the steam rendered easier upon a subsequent raising of pressure in the boiler 19. lVith the present invention interposed in the return pipes, as described, the jerking, cracking and pounding of pipes is eliminated, inasmuch as a free passage of the air to the exteriorfrom the intcriorof the pipes is had at all times.

\Vhile I have illustrated and described the preferred form of structure, I do not wish to limit myself tothe precise form of structure shown but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A circulating drip vent of the class described, comprising a T-shaped member having a bore formed in the arm thereof, said bore being reduced, adjacent the outer end of one of said arms, the stem of said T having a bore formed therein; a cap mounted on said stem and having an opening formed centrally thereof in registration with the bore in said stem, the base of said cap being normally spaced from the end of said stem; and a closure loosely positioned on the end of said stem, intermediate said cap and said stem, said closure being normally of larger diameter than the bore. in said stem.

2. A drip rent of the class described, adapted for use in connection with a steam heatingsystem, having a boiler; a plurality of radiators and a return pipe for each radiator, comprising a T-shapcd member, the ends of the arms of said T being interposed in said return pipe, intermediate said radiator and said boiler, said arms having a bore formed therein, said bore being reduced, adjacent the end of one of said arms, said reduced portion being connected to said return pipe at the end adjacent said boiler, the stem of said T having a bore formed therein in communication with the large bore in said arms; a cap for the end of said stem, said cap having an opening formed therein; and a closure adapted for loose positioning on the end of said stem.

3. A drip vent of the class described, comprising a T-shaped member having a bore formed in the arms thereof, said bore being reduced. adjacent one end of said arms, said arms being adapted for interpositioning in a return pipe with which used, the stem of said T having a bore formed therein, in communication with the large bore in said arms, the end of said stem being threaded; a cap adapted for threading on said threaded end. of said stem, said cap having a centrally positioned openings formed in its base, adapted for registration with the bore in said stem; and a closure mounted on said stem intermediate the end of said-stem and .the inner surface of said cap, said closure being adapted for movement relatively to said end of said stem for opening and closing communication between said bore and theppening in said cap.

4. A drip vent of the class described, comprising a T-shaped member having a bore formed in the arms thereof, said bore bein reduced, adjacent one end of said arms, said arms being adapted for interpositioning in a return pipe with which used, the stem of said T having a bore formed therein, in communication with the large bore in said arms, the end of said stem being threaded: a cap adapted for threading on said threaded end of said stem, said cap having a centrally positioned opening formed in its base, adapted for registration with the bore in said stem; and a disc mounted on said stem intermediate the end of said stem and the inner surface of said cap, said closure being adapted for movement relatively to said end of said stem for opening and closing communication between said bore and the opening in said cap.

5. A circulating drip vent of the class described comprising a T-shaped member having a bore formed in the arm thereof, said bore being reduced adjacent the outer end of one of said arms, the stem of said T having a bore formed therein in communication with the bore in said arms, the free end of said stem being exteriorly threaded; a cup-shaped cap threaded on said stem and having an opening formed in its base in communication with the bore in said stem: and a disk loosely mounted in said cap and adapted, upon movement in one direction, for engaging the end of said stem and covering the end of the bore formed therein, and upon movement in the other direction for engaging the inner surface of the base of said cap for closing the opening formed therein.

In testimony whereof, I have signed the foregoing specification.

AUGUST BUSS. 

